ASK and FSK coherent lightwave systems: a simplified approximate analysis

Author

Kazovsky, Leonid G. ; Tonguz, Ozan K.

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

8

Issue

3

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

338

Lastpage

352

Abstract

A simplified approximate analysis of amplitude shift keying (ASK) and frequency shift keying (FSK) coherent optical communication systems is presented. The analysis accounts for the phase noise of the transmitter and the local oscillator lasers and for the additive Gaussian noise stemming from the shot noise and thermal noise. The analysis yields a closed-form estimate of the bit error rate (BER) and allows an immediate physical insight and appreciation of the impact of the IF filter bandwidth, laser linewidth, and bit rate on the system performance. The theory also yields reasonably accurate estimates of the optimum IF bandwidths and of the sensitivity penalty stemming from the phase noise

Keywords

amplitude modulation; frequency shift keying; light coherence; optical links; optical modulation; spectral line breadth; thermal noise; ASK; ASK coherent lightwave systems; FSK; FSK coherent lightwave systems; IF filter bandwidth; additive Gaussian noise; amplitude shift keying; approximate analysis; bit error; closed-form estimate; frequency shift keying; laser linewidth; laser noise; local oscillator lasers; optimum IF bandwidths; phase noise; sensitivity penalty; shot noise; thermal noise; transmitter noise; Additive noise; Amplitude shift keying; Bit error rate; Frequency shift keying; Gaussian noise; Laser noise; Laser theory; Optical noise; Phase noise; Yield estimation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.50731

Filename

50731